White Polyvinyl Chloride (PVC) Waterproof Rolls for Tunnels Product Features Tunnel-used PVC waterproofing membrane is a special high-m waterproof material customized for high-pressure underground water environments such as tunnels and culverts. With high-polymerization degree polyvinyl chloride resin as core raw material, is added with a high proportion of plasticizers and anti-fatigue additives, matched with a high-strength polyester fiber inner reinforcement layer. Its